Horace b



(Model.)

H. B. MURDOGK STEAM INJEeToR.

No. 440,183. Patented Nov. 11, 1890'.v

WWESSES Nrrnn STATES HORACE B. MURDOCK, OF DETROIT, MICHIGAN, ASSIGNOR TOTI'IE AMERICAN INJECTOR COMPANY, OF SAME PLACE.

STEAM-INJ ECTO R.

SPECIFICATION forming part of Letters Patent No. 440,183, dated November 11, 1890.

Application filed July 26,1889. Serial No. 318,742. (Model.)

To all whom it may concern:

Be it known that l, HORACE B. MURDOCK, a citizen of the United States, residing at Detroit, county of IVayne, State of Michigan,

have invented a certain new and useful Improvement in Live-Steam Injectors; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it lo pertains to make and use the same, reference being had to the accompanying drawing, which forms a part of this specification.

'In the drawing the figure is a Vertical section showing parts in elevation of an injector I 5 embodying my invention.

It is the purpose of my invention to produce an injector of the character known as double7 injectors, in which there are two force-tubes, said tubes being arranged in parzo allel order and operated by a single lever on a shaft parallel thereto.

The nature of my improvements will be understood by the following description.

A represents the injector-case.

B is the water-supply pipe; C, the steamsupply pipe; D, the conduit leading to the boiler; E, the overflow-conduit.

F is the iirst or primary force-tube, and G the other or secondary force-tube.

F and G are the respective steam-nozzles.

F2 and G2 are the corresponding overflowvalves.

F3 and G3 are valves governing the admisn sion of steam to the respective nozzles.

3 5 The force-tube, steam-nozzle, steam-valves, and overiow-valve are arranged in line in each series, and the two series are arranged in parallel order, as shown. Parallel with the two series, as above, is a shaft I-I, tapped 4o through a stationary support I-I, and provided with cross-heads H2, to which said steam- Valves and overilowvalves are secured. Each said valve-stein is seated in an open yoke at the end of the cross-head, the stem being reduced, as shown at 7L, so as to be held firmly by the yoke against longitudinal displace- `nient, and each is provided with a slot h or other facilities for engagement With a tool, whereby it may be turned to grind its valve 5o upon the valve-seat.

h2 are stuffing-boxes through which the valves slide as they are moved toward 0r from their seats.

It Will be observed that as the handle I is turned through the screw engagement I-I the.. 5 5 shaft II with its valves is shifted longitudinally. The steamvalve Fs is seated so as to open at once on turning the handle I. The conical end g of the steam-valve G3 is sleeved int-o its seat, as shown at g, so as to simul- 6o taneously leave its seat, but not to lopen a steam-passage until 'the handle is given a further turn. On the other hand, the conical end f of the overflowvalve F2 is sleeved into its seat, as shown at f, so as to cut off the overflow in advance of the overflow-valve G2r and yet adapted to come to its final seat simultaneously with the valve G2.

The operation of the device Will now be understood. The steam-valves are closed 7o down on their seats, both overflow-valves F2 G2 are open, and the handle is in the position, all as shown in the drawing. Now, when it is desired to start the injector, the handle is given a quartewturn. This opens a steampassage past the valve F3, and the Water is lifted and accelerated through the primary force-tube F, the overflow-valve F2 being still open, thereby facilitating the iioW. As soon as Water overflows through the valve F2 the 8o handle is turned until it has completed a halfrevolution. This results in closing the overflow-valve F2 While the overflow-valve G2 still remains open and the steam-valve G3 closed. The result is that the Water, inding no escape 8 5 through F2, is obliged to pass up through the passages b and through the secondary forcetube G, and finds relief through the 0verfloW- valve G2, which is yet open. NOW the handle is brought around so as to complete three- 9o quarters of the entire revolution. The result of this further movement is to open the steam-passage past the valve G3, which serves to accelerate the Water through the forcetube G, while some relief is still 'had at the 95 overiiow-valve G2 not yet entirely closed. A further turn of the handle opens the steamvalve G3 still wider, closes both the overflowvalves firmly on their conical seats, and the current is fully established into the boiler. loo

The passages c afford free access of steam at alsl times to the chambers back of the valves F G Of course it is not absolutely essential that the rod or shaft II should pass through the bodyl of the injector or between the two series of steam-valves, since the construction in this respect might be changed without departing from the spirit of my invention.

What I claim is-` 1. An injector provided with two series of steam-valves, force-tubes, and overflowvalves, all said Valves connected with a single actuating-shaft adapted to move them equally and simultaneously, substantially as described.

2. An injector consisting of the combination, with two series of steam-valves, forcetubes, and overflow-valves adapted to act successively on the feed-Water, of an actuatingn shaft to which all said valves are engaged and which operates them simultaneously, said valves and their valve-seats so adjusted with respect to each other that as the actuatingshaft is moved the primary steam-valve will open a steam-passage in advance of the secondary, and the primary overflow-valve will close its escape-passage in advance of the secondary, substantially as described.

3. In an injector, the combination, with two parallel series of steam-valves, force-tubes,

v and overflow-valves arranged to act successively on the column of feed-Water, of a parallel actuating-shaft to which all said valves are engaged, the primary overflow-valve and the secondary steam-valve each having a close-fitting socket or sleeve in advance of its parallel series of steam-valves, force-tubes, v

and overflow-valves, of' an actuating-shaft parallel thereto, with which all said valves are engaged, said shaft tapped through a stationary support, and a handle for turning it in its said support, whereby said valves are actuated,substantially as described.

5. The combination, With the actuatingshaft, of the valvestems engaged therewith by a shouldered engagement, whereby they are prevented from longitudinal displacement, and provided at their ends with facilities for engagement with a tool for rotating the same and grinding the valves on their seats, substantially as described.

6. In an injector, the combination, with the valves F3 G2, of the valves F2 G3 and the sleeves or sockets f g back of the latter valves, whereby they are permitted to move a distance from their seats before opening the passages past them, substantially as and for the purpose described. Y

In testimony whereof I sign this specification in the presence of two Witnesses.

HORACE B. MURDOCK.

Witnesses:

W. H. CHAMBERLIN, L. A. DoELTz. 

